There is a theory explaining the difference in sounding tube and modern amps, and consequently also in acoustics and signal sources. There are some set of supporting facts in the same areas. There is a current link these facts with the existing theory of sound reinforcement and reproduction. There is a graphic display. But in general it is clear that more work is required. Of course, it would be interesting to read for everyone, but it will deny, precedence, and other things. No write -too bad:). Sit and think on their own. Question relates to possible priorities, which could get the big players of the common market. Not sure now of anyone leaking information is protected, but big companies here easier. How to deal with the "know how"?

Has anyone experienced?

P.S I have experience of patenting and the assessment of actions as well as the possible applications perspectives.In this case, it is not the solution.

DF96

19th June 2013 09:41 AM

Quote:

Originally Posted by Sergey A

There is a theory explaining the difference in sounding tube and modern amps, and consequently also in acoustics and signal sources.

Is there? Are you going to tell us what it is, or is it a secret?

M Gregg

19th June 2013 09:47 AM

Quote:

Originally Posted by DF96
(http://www.diyaudio.com/forums/showthread.php?p=3531378#post3531378)

Is there? Are you going to tell us what it is, or is it a secret?

:D...Nice...LOL

Regards
M. Gregg

thoglette

19th June 2013 09:54 AM

Everything new is old again.

Quote:

Originally Posted by DF96
(http://www.diyaudio.com/forums/showthread.php?p=3531378#post3531378)

In summary
"...the triode would continue to enjoy some advantages over the semiconductors--and the pentode, for that matter."

This allows lower levels of feed back.

And as I've already quoted him twice this week, let's go back to where this started (pre transitor), Crowhurst, N. H., 1957 Some Defects in Amplifier Performance Not Covered by Standard Specifications JAES 5(4).

Reading the works of Marshall, Gilbert's Leach, Cordell, Self, and so on, as well as looking at the Audio shows, it becomes clear that all is not so funny:)

The work-not theory, and have a simple explanation in my. But the question is not about that.

thoglette

19th June 2013 10:33 AM

which solid state amplifiers should one listen to?

Quote:

Originally Posted by Sergey A
(http://www.diyaudio.com/forums/showthread.php?p=3531398#post3531398)

.. all is not so funny:)

Well, I listen to a JLH most days.

On my list of solid state amps to listen to are:

ME Sound

Le Monstre (Jean Hiraga)

AKSA (Hugh Dean)

Musical Fidelity A1

Zues (Susan Parker)

R.E. Designs LNPA-150

All of these have been listed as "not your usual silicon AB amp" or "sounds like a good valve amp" by more than one person. Any other candidates?

I should add Papa Nelson Pass's amps to this list, I've heard and built a few Zen style amps (and a Pass Aleph) and it's probably time to return one to the stable.

Along with favorite, personal amps by Doug Self and Marshall Leach. But as I've been watching the progress of Hugh Dean along the line of "linearity first" for many years that's where my next AB amp will come.

Sergey A

19th June 2013 10:55 AM

All of These work, you are commendable, but can you make the measured feature which would be uniquely described them? And then consider only differences?
I think hardly. Now there is no problem in technology solutions.
JLH is very fortunate, but in our economical time cannot be used. :) especially in mobile devices.

thoglette

19th June 2013 11:14 AM

Quote:

Originally Posted by Sergey A
(http://www.diyaudio.com/forums/showthread.php?p=3531428#post3531428)

All of These work, you are commendable, but can you make the measured feature which would be uniquely described them? And then consider only differences? .

Sorry I still need to listen to all of them - this is not something I've managed to do yet.

Quote:

Originally Posted by Sergey A
(http://www.diyaudio.com/forums/showthread.php?p=3531428#post3531428)

..in mobile devices.

Well then we're off in Class D. Which is another problem space all together.

I don't think anyone knows what the problems/answers for them are yet

M Gregg

19th June 2013 11:26 AM

Well,

Can you tell the difference with an old valve amp against a trainsistor or fet amp if you can't see it..I have found that sometimes a tube amp can sound like an old "not very good" transistor amp it depends on a lot of factors..

Can you tell the difference between a fet stage driving an output Tx and a tube amp?

Even Tim De paravicini said he made a FET version of his high end amp and said it was just as good. I think it was the Yoshino..

But then again whats the point of a SS amp that sounds like a tube amp (except for guitar) if most people are saying the valve is adding distortion..Perhaps different distortion to a transistor circuit..

The same is true for both types with types of PSU (choke or other)..

Regards
M. Gregg

M Gregg

19th June 2013 11:36 AM

I should add,

If this is just a case of "Shaping the sound with filters" then why can't you just flick a software switch and have utopia<<I haven't seen it yet because the tube circuit is reactive not just passive..And yes its all about the output Tx<<well no it isn't because OTL can sound just as good if not better..
The driving force for the tube will become secondary over time as energy becomes more expensive.